Pencil-sharpener.



` PATBNTBD MAY 26, 190s.

n jf@ r.'.Fo all whom. it may concern:

.eline Said 'cutting element.

.disk 4 and in a boss 'uNrrnn sriarnsrnrnnr oir-Fien.

CHARLES C. SPENGLER', OF ROCKFORD, ILLINOIS, ASSIGNOR TO AUTOMATIC PENCIL SHARP- ENER COMPANY, OF NEW YORK, N.

Y., A CORPORATION OF NEW YORK.

PENCIL-SHARPENER.

Patented May 26,-1908.

Application led February 13, 1907.- Serial No. 357,151.

Be it known that I, CHARLES C. SPENGLER, a citizen. of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and4 useful Improvements "in Pencil-Sharpen'- ers, of which the following is a specification.

Oneof the objects of this invention is they .pro'ductionof a machine for sharpening pencils arranged to sharpen or Whittle the pencil by meansof a diagonal or draw-cut.

Another object of the invention is the p ro duction of! means for permitting the cutting member to yield in order to prevent breakage.

- The invention also relates to the other improvements in pencil Sharpeners hereinafter set forth.

. In the accompanying drawings, Figure 1 is a front elevation partly in section of a pencil Sharpener embodying the features of my invention. Fig. 2 is a vertical sectional view through the machine, taken -on the plane of dotted line-2 2 of Fig. 1. Fig. 3 is a vertical section on dotted line 3 3 of Fig. 1.

The present embodiment of my invention comprises a box-'like base 1 adapted to support the mechanisms of the machine, and iaving an o ening 2 in its up er wall through whic the shavings and ust produced in the operation of the machine fall ymounted a cutting element, to be hereinafter more'specifically described, adaptedy to operate-utpon a pencil supported 1n a plane inwith-relation to the plane of action vof The pencil is supportedina cylindrical opening 5 formed m the 6 upon the rear side of said disk. Thelower Yend of the opening 5 terminates iny the face of the disk 4 and is somewhat contracted to form a seat 7 forthe oint of the pencil when the latter has been ully sharpened, as will appear hereinafter. At theup'perend of the opening 5 is located vmeans for engaging the pencil to permit of .said pencil bemgrotated, said means, in this instance, comprising a sleeve 8 rotatably mounted in the-enlarged 'upper end 9.ofy the v sition to l I opening 5, the lower end of said sleeve bearing upon the annular shoulder 10.

In the upper portion of the sleeve 8 is located means for yieldingly gripping the pencil being o erated upon, said means comprising a plura ity of spring fingers 11 attached at dne end to the periphery of said sleeve, one end ,12 of each of said spring fingers being bent to enter a slot 13 formed in the sleeveS, said bent portion extending into the central bore of the sleeve into position to engage a pencil therein. The body portions of the spring fingers 11 lie within an annular groove 14 formed inthe periphery of the sleeve. 'Io the sleeve 8 is fixed a ring 15 provided with a peripheral series of teeth 16, said ring lying ing frictiona y held thereagainst by means of two s ring fingers 17 bearing upon the up- Iper su ace of said ring, said fingers being provided with an attaching portion 18 secured to the rear side of the 'boss 6. The spring fingers 17 frictionally engage the ring 15 with sufficient force to prevent the sleeve 8 and the pencil rotated thereby fromrotating too freely. The 'teeth 16 of the ring 15 project beyond the face' of the disk 4 into pobe engaged by a member hereinafter described by means of which the sleeve 8 is given a succession of intermittent partialrotations.

Upon the rear side of the disk`4 is a bearin 19. A shaft 20 is rotatably mounted insai bearing and carries at its forward end a crank or face plate 21 which may be formed integral with said shaft, if desired, said face plate 'lying within al circular recess 22 vformed in the disk `4. To therear end of the shaft 20 is xed a crank 23.

ing 25 therein is slidably and pivotally` connected with the disk 4 by means of a screw 26 or equivalent device extending through said th t e knife arm At a suitable point in its leng late lvnewal. In the present instance, the knifei upon the uppler surface of the boss 6 and be- Y A knife bar 24 vhaving an elongated openelongated opening and engagin the disk .4.

= pencil or at right angles thereto.

blade 28 is secured to the knife arm 24 by means of pins 29 fixed in the knife arm and,

entering openings in the knife blade, and a screw 30 extending through said knife blade into a screw-threaded opening in the knife arm.

A nger 31 is fixed to the knife arm 2e at a suitable point and is ofsuflicient length to enter the space between twoadjacent teeth 16 of the ring 15 when said knife arm 1s at the highest point in its movement. As the knife arm 24 moves forwardly and downwardly, said finger pushes before it a tooth 16 there by rotating the sleeve 8 and the pencil lying within said sleeve.

In order to permit the knife blade 28 and the knife arm 24 to yield slightly so as to prevent breakage should a pencil be forced into' the lower end of the opening 5 while said knife blade lies over said opening, l make the shaft slidable longitudinally in its bearing 19 and provide a coiled spring 32 for holding said shaft and the cutting element attached to and actuated by said shaft in their normal position. Said spring surrounds the shaft 2O and lies within a recess 33 formed in the rear end of the bearing 19, the spring bearing against the inner end of` said recess and the crank 23.

In operation, the inserted in the sleeve 8 and the opening 5, the s ring fingers 11 yielding to permit the penci to pass between them, but frictionally engaging said pencil. The lower portion of the pencil projects to a 0freater or less extent through the lower end of the opening 5. The shaft' 20 being rotated by means of the crank l23, the knife arm 24 is reciprocated and tilted, causing the knife blade 28 to move diagonally downward and across the lower end of the opening 5, and thereby cut off a portion of the wood and lead of said pencil projecting from sai'd opening. During each complete cycle of movement of the knife arm 24 the finger 31 carried by said knife arm engages the teeth 16 of the ring 15, causing a partial rotation of the sleeve 8 and the pencil, and thereby causing a fresh portion of the pencil to be presented to the 50 knife. As the pencil is whittled away the ldownward pull of the knife blade upon the pencil causes the latter to sink deeper into the opening 5 until the point reaches the bottom of the seat or recess 7, when further descent is prevented, the pencil then being fully sharpened. It ,will be observed that the movement of the knife blade 28 is diagonally downward over the lower open end of the opening 5, thus causing a diagonal or draw-cutting action upon the pencil. Such a draw-cutting action is less likely to splinter the Wood of the pencil or break the lead thereof than a out longitudinally of the Should the 5 when the pencil be forced into the opening pencil to be sharpened is' ssaese knife blade 28 stands in front of said opening, the coiled spring 32 permits said knife bladeto yield outwardly, thus preventing breakage. A l

Vfhile l have described in some detail a specific embodiment of my invention which l deem to be new and advantageous in the details of construction, I do not desire to be understood as limiting myself in respect to the broader features of my invention to the specific construction shown and described.

i l claim as my invention:

1. In a pencil Sharpener, in combination, means for rotatably supporting the pencil a slidably and tiltably mounted knife bar; means for moving said knife bar 3 and means carried by said knife bar adapted to rotate said pencil-supporting means.

2. ln a pencil Sharpener, in combination, means for rotatably supporting the pencil a toothed member fixed to said pencil-su porting means; a slidably and tiltablv' mounted knife bar 5 means for moving said' knife bar, and member carried by said knife bar adapted to engage said toothed member. l

3. ln a pencil shar ener, in combination, a rotatably mounted sleeve for supporting the pencil; an annular toothed member fixed to said sleeve l: a slidably and tiltably mounted knife bar 5 means for moving s aid knife bar, and a finger fixed to said knife bar and adapted to engage said toothed member.

a. In a pencil Sharpener, in combination, means for rotatably supporting the pencil g a knife bar, means engaging one portion of said knife bar to permit of a sliding movement thereof, means for giving another portion of said knife bar an orbital movement; and means carried by said knife bar for rotating said pencil-supporting means. y

5. In a pencil Sharpener, in combination, means for rotatably supporting the pencil a knife bar,l means engaging one portieri of said knife bar to permit of a sliding move- 113 ment thereof a crank operatively attached to said knife bar, and a member attached to said knife bar adapted to rotate said pencilsupporting means. 6. In a pencil Sharpener, in combination, 115 means for rotatably supporting the pencil a knife bar having an elongated opening therein means extending through said opening for limiting the movement of said knife bar g a crank attached to said knife bar; and a member carried by said knife bar adapted to rotate said pencil-supporting means.

7'. In a pencil Sharpener, in combination, means for supporting the pencil; a fixed member; a knife bar having a longitudinal opening therein; a member extending through said longitudinal opening and attached to said fixed member; a cutting element attached to said knife bar,- and a crank connccted with said knife bar at a point bcally aWay from said surface; and means which the pencll projects, said surface lying tween said cutting element and said slotted portion.

8. In a pencil Sharpener, in combination, a member having an o ening therein for the reception of the penci said opening extending to a plane surface of said member; a cutting element; and means for actuating said cutting element comprising a longitudinally slidable, spring-held shaft' adapted to hold said cutting element yieldingly against said plane surface.

9. Ina pencil Sharpener, in combination, a member for'supporting the pencil, said member having an opening therein through Which the pencil may project; a cutting. element arranged normally to move over said opening in a plane inclined With reference to the plane in Which the pencil is supported, said cutting element being arranged to yield laterally aWay from sald openin and means tending tov hold said cutting e ement in operative relation to said opening.

'10. In a pencil Sharpener, in combination, a member for supporting the pencil, said member having a plane surface through in a plane inclined With reference to the pen- Y cil; a.cutting element arranged normally to move in contact with said surface, said cutting`V element being arranged to yleld latertending to hold said cutting element against said surface.

11. In a pencil Sharpener, in combination,

a member having an opening therein for the receptionl of the pencil; a' slidably and tiltably mounted knife bar carrying a knife; means for moving said knife bar; and means for yieldingly pressing said knife against said member. Y

' 12. In a pencil Sharpener, in combination,

a member for supporting the pencil, said member havin -a plane surface through 'which the penml projects, said surface lying ina plane inclined With reference to the pen- 'a supportin cil; a slidably and tiltably mounted knife bar; a cutting element carried by said knife bar and arranged normally to move in contact with said surface, said knife bar being arranged to yield laterally; and means tending to hold said cutting element against said surface.

13. In a pencil Sharpener, in combination,

member having an openin therein for tie reception of the pencil, sai opening extending to a plane surface of said supporting member; a sleeve rotatably mounted in said supportingv member and adapted to receive the pencil; means carried by saidsleeve for engaging the pencil; an annular toothed member xed -to said sleeve; a shaft rotatably mounted in said .supporting member; a crank attached to said shaft;

a knife bar connected to said crank, said knife bar vhaving an elongated opening therein;` a member fixed toksaidvv supporting member and extending into said elongated opening; a knife ixed to said knife bar in position to operate across the opening in said supporting member; a coiled spring surrounding said shaft and bearing at its end against said supporting member and a portion fixed with relation to said shaft for yieldingly holding said knife against said plane surface; and a finger ixed to said knife bar and adapted to engage said annular member for rotating said sleeve.

14. In a encil Sharpener, the-combination of a pencilolder provided with an `opening in one face, through Which a portion of the pencil is adapted to protrude, a cutter movable adjacent the face of the holder, a supporting member for the cutter, means for moving the member; to o crate the cutter, and yielding means for lio ding the cutter in position with relation to the pe'ncil holder.

CHARLES C. SPENGLER. Witnesses:

C. PAUL PARKER, GEORGE L. CHINDAHL. 

